Abstract
A recommendation on the decay heat power in nuclear reactors was issued from the Research Committee on Standardization of the Decay Heat Power in Nuclear Reactors of Atomic Energy Society of Japan (AESJ). The recommendation is based on the summation calculation results with the Japanese Nuclear Data Committee (JNDC) Fission Product (FP) Nuclear Data Library, Version (JNDC-V2) and the recommended data are consisted of tabulated values of decay heat power, its β and γ-ray components, and their accuracies for five fissionable nuclides; 235U, 238U, 239Pu, 240Pu and 241Pu. A set of 33-term exponential polynomials are given to help the users calculating the decay heat power for any irradiation history and cooling time. The time evolution of the energy spectra of the γ-ray component is also given. A realistic estimation of the neutron capture effect on the decay heat power can be obtained by the interpolation of the tabulated data obtained by the summation calculation.
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